From fff57ad3f3a79f94f40fd2b9641c2d4d82c0c05f Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Tue, 24 Mar 2020 18:54:50 +0100
Subject: [PATCH] Ensure that only valid appointments are being processed.

---
 application/controllers/Appointments.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/application/controllers/Appointments.php b/application/controllers/Appointments.php
index 04401f60..5d3df41f 100755
--- a/application/controllers/Appointments.php
+++ b/application/controllers/Appointments.php
@@ -926,6 +926,11 @@ class Appointments extends CI_Controller {
             {
                 $appointment_start = new DateTime($provider_appointment['start_datetime']);
                 $appointment_end = new DateTime($provider_appointment['end_datetime']);
+
+                if ($appointment_start >= $appointment_end) {
+                    continue;
+                }
+
                 $period_start = new DateTime($selected_date . ' ' . $period['start']);
                 $period_end = new DateTime($selected_date . ' ' . $period['end']);